Deer have horrible vision - 20/200! They have a 360 degree view horizontally, but they cannot gauge well what is directly in front of them. Use deer fence warning banners to alert deer of the presence of a new physical deer barrier. The white warning banners will help to prevent any accidental hits to the virtually invisible fence caused by deer. Once the fencing has been up for a while (usually between 2-6 months), and the deer have established a new path, the banners can be safely removed. Banners are most effective when placed on the fence line every 10 feet at a height of between 3-4' above ground. Each strip is 1" wide x 24" long and white in color. Pack contains 20 banners in white and is ideal for pairing with 100' fencing rolls.